A.O. Smith 140 Benutzerhandbuch

Installation and Service Manual Upsilon-Series

5.4 Connecting the boiler

A. Remove the remaining packaging part from the bottom of the boiler.

Note: this packaging part is provided with boiler parts which are needed for

mounting the boiler.

B. Cap the connections that are not used on the pipe work headers:

Flow and return:

ø35mm blind compression fitting

(2 items/boiler)

Gas:

1 ¼" blind cap with gasket

(1 item/boiler)

For connections, use the supplied gaskets. Check all connections for leakage

and gas-tightness.

C. Connect the isolations valves to the boiler:

Flow: 1½" flat coupling x 35mm compression isolation valve with red handle

Return: 1½" flat coupling x 35mm compression fitting cross union with

fill/drain valve and isolation valve

Fit according to the installation design choice the supplied 3 or 4 bar overflow safety

valve in the cross union.

Gas: 1¼" x 28mm gas isolation valve

Polluted test water may be released when removing the plastic caps on the

boiler flow and return.

For connections, use the supplied gaskets. Check all connections for leakage

and gas-tightness.

D. Connect the valves to the pipe work headers:

Flow: 35mm pipe pieces with 35mm compression fittings (elbow and socket)

Return: 35mm pipe pieces with 35mm compression fittings (elbow and socket)

Gas: 28mm pipe piece with 1¼" flat and 28mm compression fitting

Back-to-back installation:

Flow: 35mm pipe pieces with 35mm compression fittings (bend and socket)

Return: 35mm pipe pieces with 35mm compression fittings (bend and socket)

Gas: 28mm pipe piece with 1¼" flat and 28mm compression fitting

For connections, use the supplied gaskets. Check all connections for leakage

and gas-tightness.

E. Fill the siphon with tap water and fit the siphon cup underneath the boiler.

The siphon cup is supplied separately and can be found behind the housing.

Figure 5.4.b

Figure 5.4.c

Figure 5.4.d

Figure 5.4.a